161331104 has 24 divisors (see below), whose sum is σ = 346495968. Its totient is φ = 73332160.

The previous prime is 161331103. The next prime is 161331133. The reversal of 161331104 is 401133161.

It is not an unprimeable number, because it can be changed into a prime (161331103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228812 + ... + 229515.

It is an arithmetic number, because the mean of its divisors is an integer number (14437332).

Almost surely, 2^161331104 is an apocalyptic number.

It is an amenable number.

161331104 is an abundant number, since it is smaller than the sum of its proper divisors (185164864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161331104 is a wasteful number, since it uses less digits than its factorization.

161331104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458348 (or 458340 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 161331104 is about 12701.6181646277. The cubic root of 161331104 is about 544.3848559832.

Adding to 161331104 its reverse (401133161), we get a palindrome (562464265).

The spelling of 161331104 in words is "one hundred sixty-one million, three hundred thirty-one thousand, one hundred four".